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Cisco Bug: CSCvt85490 - CFM down meps over bundle subinterfaces flap on RPFO

Last Modified

Sep 02, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

6.3.1.CE

Description (partial)

Symptom:
This defect occurs after an RPFO (and the new RP has come up) with a large number of MEPs on bundles or a high rate of CCMs being sent out on bundles. This defect can also be seen after performing a process restart of cfmd on a node with a large number of MEPs on the interfaces, or a high rate of CCMs being sent out on these interfaces. 

The observed scale was for 4000 MEPs on bundle interfaces, each sending CCMs at a rate of 1 per second.

If the aforementioned events occur, and CCMs are sent from a MEP which contain an error bit indicating that the interface state is unknown then this defect applies to this scenario.

This defect should not be observed during normal operation of CFM.

Conditions:
The CFMD process must have restarted either by RPFO or manual process restart.

This defect will only happen if a large number of MEPs are present, or a high rate of CCMs are being sent.

This defect was seen when 4000 MEPs on bundles were configured, each sending one CCM per second.
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